Helmet



FIG. 1 is a top, front and right side perspective view of a helmet showing my new design with the shield plate in a closed position;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view therof; and,

FIG. 7 is a top, front and right side perspective view thereof, with the shield plate in an opened position. 

The ornamental design for a helmet, as shown and described. 